Ventilation device, fresh air module and air conditioner

Abstract

The utility model discloses a ventilation device, a fresh air module and an air conditioner, and relates to the technical field of air conditioning equipment.The ventilation device comprises a shell and a sound absorption piece; the shell is provided with an air duct, and a plurality of through holes are formed in the side wall of the air duct; the sound absorption part comprises a cover plate and a plurality of blocking columns arranged on the cover plate, the cover plate is arranged on the outer side of the shell, a sound absorption cavity is defined by the cover plate and the shell, the ends of the blocking columns extend into the through holes, communicating seams are formed between the peripheries of the blocking columns and the hole walls of the through holes in a spaced mode, and the through holes are communicated with the communicating seams. And the sound absorption cavity is communicated with the air duct through the communication seam. According to the technical scheme provided by the utility model, the side wall of the air duct is provided with the tiny communicating seam so as to reduce the noise output by the ventilation device.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, in particular to a ventilation device, a fresh air module and an air conditioner. Background Art

[0002] Existing air conditioning equipment usually has functions such as air exchange and temperature control. In these devices, ventilation devices are provided to allow air circulation to achieve the above functions. During operation, the air flow velocity is usually high, and the flow of air in the ventilation device is likely to cause obvious noise. The prior art usually provides structures such as sound-absorbing cotton on the air duct of the ventilation device to reduce wind noise. However, since the air duct of the ventilation device is relatively short, the existing noise reduction technology has poor noise reduction effect on the ventilation device, so that the noise of the air flow is easily transmitted directly from the air outlet, affecting the user experience. Utility Model Content

[0003] The main purpose of the utility model is to provide a ventilation device, a fresh air module and an air conditioner, aiming to arrange a tiny connecting gap on the side wall of the air duct to reduce the noise output by the ventilation device.

[0004] In order to achieve the above-mentioned purpose, the ventilation device proposed by the utility model comprises:

[0005] A housing having an air duct, wherein a side wall of the air duct is provided with a plurality of through holes; and

[0006] The sound absorbing component comprises a cover plate and a plurality of blocking columns arranged on the cover plate, wherein the cover plate is arranged on the outer side of the shell and encloses a sound absorbing cavity together with the shell, the ends of the blocking columns extend into the through holes, and a connecting gap is formed between the outer periphery of the blocking columns and the hole wall of the through holes, and the sound absorbing cavity is connected to the air duct through the connecting gap.

[0007] In one embodiment, the air duct includes a fan cavity and an air outlet duct that are connected, the air outlet duct and the fan cavity are provided with the through hole, and the sound absorbing member is provided on the outside of the air outlet duct and the fan cavity corresponding to the through hole.

[0008] In one embodiment, a wind wheel is provided in the fan cavity, and a sound absorbing member of the fan cavity is arranged opposite to the wind wheel along the axial direction of the wind wheel.

[0009] In one embodiment, the air duct also includes an air inlet duct, which is opposite to the fan cavity in the axial direction of the wind wheel, and is provided with the through hole. The sound absorbing component is provided on the outside of the air inlet duct corresponding to the through hole and opposite to the air inlet end of the wind wheel.

[0010] In one embodiment, the air inlet duct is provided with an air inlet, and in the direction from the air inlet to the wind wheel, the distance between the side wall of the through hole provided in the air inlet duct and the wind wheel gradually decreases.

[0011] In one embodiment, the air outlet duct includes a first air outlet sound absorbing component and a second air outlet sound absorbing component opposite to each other in the axial direction of the wind wheel, the shell includes a first half shell, a second half shell and an air inlet cavity shell, the first air outlet sound absorbing component and the sound absorbing component of the wind wheel are arranged on the first half shell, and the second air outlet sound absorbing component is integrally formed with the air inlet cavity shell and connected to the second half shell.

[0012] In one embodiment, the sound absorbing cavity enclosed by the second air outlet sound absorbing member is larger than the sound absorbing cavity enclosed by the first air outlet sound absorbing member, and the second air outlet sound absorbing member is arranged on the same side and in parallel with the sound absorbing member of the air inlet duct.

[0013] In one embodiment, the air outlet duct extends at the periphery of the fan cavity, and an air outlet direction of the air outlet duct forms a right angle or an acute angle with an air outlet direction of the fan cavity.

[0014] In one embodiment, the maximum width of the connecting seam is defined as d, and d satisfies: 0.3 mm≤d≤1.2 mm.

[0015] In one embodiment, on the side wall of the air duct, the end surface of the blocking column is arranged flush with the through hole.

[0016] In one embodiment, the cross-sectional shape of the blocking column is consistent with the cross-sectional shape of the corresponding through hole.

[0017] In one embodiment, the cross-sectional shape of the blocking column and / or the cross-sectional shape of the through hole is configured to be at least one of a circle, a triangle and a rectangle.

[0018] The utility model also provides a fresh air module, which includes the ventilation device as mentioned above.

[0019] The utility model also provides an air conditioner, which includes the fresh air module as mentioned above.

[0020] The technical solution of the utility model is to open a plurality of through holes on the side wall of the air duct in the shell, and arrange sound-absorbing components on the side walls of the air duct corresponding to the through holes on the outside of the shell, so that the cover plate of the sound-absorbing component is opposite to the side walls of the air duct with the through holes, and enclose a sound-absorbing cavity, and a plurality of blocking columns are arranged on the cover plate, and the blocking columns are inserted into the corresponding through holes to form a connecting seam, thereby reducing the area on the through holes that can be used for communication between the sound-absorbing cavity and the air duct, avoiding destruction of the original flow state of the airflow, and reducing the probability and degree of secondary noise generated by the air duct due to the through holes on the basis of achieving a good sound absorption effect by utilizing the connecting seam, thereby reducing the noise output by the ventilation device, and further, the blocking columns are arranged on the cover plate, and the connecting seam is limited and formed by the blocking columns and the corresponding through holes, thereby reducing the difficulty of forming the connecting seam, and during the assembly process, while the sound-absorbing component is covered to enclose the sound-absorbing cavity, the connecting seam is also formed synchronously, which is convenient to operate and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of an embodiment of a ventilation device provided by the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of explosion of the central ventilation device;

[0024] Figure 3 for Figure 2 An exploded schematic diagram of the central air intake cavity shell and the corresponding sound absorbing components;

[0025] Figure 4 for Figure 1 Explosion diagram of the middle air inlet cavity shell and the second half shell;

[0026] Figure 5 for Figure 1 An exploded schematic diagram of the first half shell and the corresponding sound absorbing member;

[0027] Figure 6 for Figure 1 A schematic cross-sectional view of a central ventilation device;

[0028] Figure 7 for Figure 1 A cross-sectional view of the central ventilation device;

[0029] Figure 8 for Figure 1A cross-sectional view of the central ventilation device from another perspective;

[0030] Fig. 9 A schematic structural diagram of an embodiment of the cooperation between a through hole and a blocking column;

[0031] Fig.10 A schematic structural diagram of another embodiment of the cooperation between the through hole and the blocking column;

[0032] Fig.11 The schematic diagram is a structural diagram of another embodiment of the cooperation between the through hole and the blocking column.

[0033] Description of Figure Numbers:

[0034] 100, housing; 110, first half housing; 120, second half housing; 130, air inlet housing; 140, air inlet duct; 150, fan chamber; 160, air outlet duct; 171, air inlet; 172, air outlet; 180, sound absorbing chamber; 191, through hole; 192, connecting seam;

[0035] 200, sound absorbing member; 210, cover plate; 220, blocking column; 201, first air outlet sound absorbing member; 202, second air outlet sound absorbing member; 300, wind wheel.

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] In the related art, ventilation devices are usually used in fresh air systems and air temperature control systems, acting as air ducts for air circulation or air flow power sources. However, since the air flow velocity in the ventilation device is relatively high, the collision of air with the air duct wall can easily cause noise. Generally speaking, a sound-absorbing structure is set on the side wall of the air duct, such as opening a through hole, setting sound-absorbing cotton, etc., but the sound-absorbing cotton will hinder the airflow in the already narrow air duct, causing the flow rate of the air flow to be blocked, resulting in an unobvious noise reduction effect. The through holes set in the prior art directly contact the airflow in the air duct, which may destroy the original flow state of the airflow, thereby generating secondary noise.

[0041] The utility model provides a ventilation device.

[0042] See also Figure 1 , Figure 2 and Figure 6 In one embodiment of the utility model, the ventilation device comprises:

[0043] The housing 100 has an air duct, and a plurality of through holes 191 are provided on the side wall of the air duct; and

[0044] The sound absorbing member 200 includes a cover plate 210 and a plurality of blocking columns 220 arranged on the cover plate 210. The cover plate 210 is arranged on the outer side of the shell 100 and encloses a sound absorbing cavity 180 together with the shell 100. The ends of the blocking columns 220 extend into the through holes 191. The outer periphery of the blocking columns 220 and the hole wall of the through holes 191 are separated to form a connecting seam 192. The sound absorbing cavity 180 is connected to the air duct through the connecting seam 192.

[0045] The technical solution of the utility model is to open a plurality of through holes 191 on the side wall of the air duct in the shell 100, and to arrange a sound absorbing member 200 on the side wall of the air duct corresponding to the through holes 191 on the outside of the shell 100, so that the cover plate 210 of the sound absorbing member 200 is opposite to the side wall of the air duct where the through holes 191 are arranged, and a sound absorbing cavity 180 is enclosed, and a plurality of blocking columns 220 are arranged on the cover plate 210, and the blocking columns 220 are inserted into the corresponding through holes 191 to form a connecting seam 192, thereby reducing the area of ​​the through hole 191 for the sound absorbing cavity 180 to communicate with the air duct, thereby avoiding the destruction of the airflow. The original flow state, on the basis of achieving good sound absorption effect by utilizing the connecting seam 192, reduces the probability and degree of secondary noise generated by the air duct due to the through hole 191, thereby reducing the noise output by the ventilation device. Furthermore, the blocking column 220 is arranged on the cover plate 210, and the connecting seam 192 is defined and formed by the blocking column 220 and the corresponding through hole 191, which reduces the difficulty of forming the connecting seam 192. In addition, during the assembly process, while the sound-absorbing component 200 is covered to enclose the sound-absorbing cavity 180, the connecting seam 192 is also formed simultaneously, which is convenient to operate, thereby improving production efficiency.

[0046] Among them, one through hole 191 can be inserted with one or more blocking columns 220. When a single blocking column 220 is inserted in the through hole 191, the connecting slit 192 is distributed in an annular shape along the periphery of the through hole 191. When multiple blocking columns 220 are inserted in the same through hole 191, the connecting slit 192 has an annular portion along the periphery of the through hole 191 and also has a staggered portion between multiple blocking columns 220. The blocking columns 220 can be straight and evenly arranged, or they can be in a shape with large ends and a small middle part, or, in the case of ensuring that the end of the blocking column 220 at the through hole 191 is solid, the inside of the blocking column 220 can be hollow or solid. Generally speaking, in this embodiment, a blocking column 220 is inserted into a through hole 191, and the connecting seam 192 is arranged in an annular hole, and the connecting seam 192 formed by multiple through holes 191 is uniform in shape and size, and the blocking column 220 is configured as a solid column to ensure the connection stability between the blocking column 220 and the cover plate 210, and also facilitate the production and molding of the sound absorbing member 200. It should be noted that in the embodiment of the utility model, the annular hole should be understood in a broad sense, that is, it does not specifically refer to the connecting seam 192 forming a complete annular structure feature. When the connecting seam 192 is composed of multiple sub-holes separated from each other and distributed in sequence around an axis, the substantially annular structure feature arranged by the multiple sub-holes also belongs to the definition category of the annular hole. Similarly, the width of the annular hole can be the same or different at each location. In addition, the annular hole is not a characteristic circular ring, that is, the through hole 191 is not a characteristic circular hole, and can also be distributed in a square or other shape.

[0047] In addition, in the present embodiment, each sound absorbing cavity 180 shares a side wall with the air duct, that is, the through hole 191 is arranged on the side wall of the air duct adjacent to the outside of the shell 100, that is, on the side wall shared by the sound absorbing cavity 180 and the air duct, and the side panel between the side wall and the cover plate 210 can be integrally formed with the shell 100, or can be a part of the sound absorbing member 200 and connected to the cover plate 210, so that when the cover plate 210 is arranged on the outside of the shell 100, the sound absorbing cavity 180 can be in a well-sealed state.

[0048] In one embodiment, please refer to Figures 9 to 11 , the maximum width of the connecting seam 192 is defined as d, and d satisfies: 0.3mm≤d≤1.2mm. It should be noted that, with the through hole 191 as a reference, the width referred to here is the ring width in the radial direction. It can be understood that if the width of the connecting seam 192 is too small, it means that the fitting clearance between the blocking column 220 and the through hole 191 is too small, which may cause the connecting seam 192 to be in a closed state due to factors such as manufacturing tolerance and assembly tolerance, and even cause the problem of difficulty in assembling the sound absorbing component 200 and the shell 100. If the radial width of the connecting seam 192 is too large, the probability and degree of secondary noise generated by the airflow in the air duct will be significantly increased. Preferably, d is 0.3mm to 0.8mm, for example, 0.3mm, 0.4mm, 0.5mm, 0.6mm or 0.7mm.

[0049] Please refer to Figures 9 to 11 In one embodiment, the end face of the blocking column 220 is flush with the through hole 191 on the side wall of the air duct. It can be understood that the blocking column 220 has a portion inserted into the through hole 191, and the end face of the blocking column 220 is flush with the through hole 191 on the side wall of the air duct, which is the inner end face of the through hole 191 here. In this way, the end face of the blocking column 220 and the inner end face of the through hole 191 are part of the side wall of the air duct, and the two are flushly arranged, which can reduce the roughness of the side wall of the air duct, thereby reducing the probability and degree of turbulent vortices generated by the air flow on the air duct, and further reducing the probability and degree of secondary noise generated in the air duct due to the through hole 191. Of course, in other embodiments, the end face of the blocking column 220 can also be slightly lower than the end face of the through hole 191 on the side wall of the air duct.

[0050] In one embodiment, please refer to Figures 9 to 11, the cross-sectional shape of the blocking column 220 is consistent with the cross-sectional shape of the corresponding through hole 191. Without loss of generality, a single blocking column 220 is inserted into the through hole 191 of the present embodiment, and the two have the same shape, which can ensure that the ring width of the connecting slit 192 at various locations in the circumferential direction remains consistent, avoid differences in the force exerted on the airflow when it flows to different positions of the connecting slit 192, and thus avoid the occurrence of eddy currents and other phenomena, and ensure the quiet effect and the smoothness of the flow of airflow. Among them, the cross section is defined as the cross section formed by cutting in a direction perpendicular to the blocking column. Of course, in other embodiments, the cross section of the blocking column 220 may also be inconsistent with the shape of the corresponding through hole 191, or, on the side wall of the air duct, there may be a connecting slit 192 formed by the shape of the humming surface of the blocking column 220 being consistent with the shape of the through hole 191, or there may be a connecting slit 192 formed by the shape of the two being inconsistent.

[0051] Specifically, in this embodiment, please refer to Fig. 9 The cross-sectional shape of the blocking column 220 and the cross-sectional shape of the through hole 191 are configured as a circle, please refer to Fig.10 The cross-sectional shape of the blocking column 220 and the shape of the through hole 191 are configured as a rectangle, please refer to Fig.11 The cross-sectional shape of the blocking column 220 and the shape of the through hole 191 are configured as a triangle. In this way, the uniformity of the ring width of the connecting seam 192 at various locations in the circumferential direction is guaranteed. The circular setting facilitates the assembly of the sound absorbing member 200 and the housing 100, and the square setting can provide a positioning guide for the assembly of the sound absorbing member 200, which has a fool-proof effect. Of course, the cross-sectional shape of the blocking column 220 can be configured as a circle, and the corresponding shape of the through hole 191 can be configured as a square, or the cross-sectional shape of the blocking column 220 can be configured as a square, and the corresponding shape of the through hole 191 can be configured as a circle.

[0052] In one embodiment, please refer to Figure 2 , Figures 6 to 8The air duct includes a fan cavity 150 and an air outlet duct 160 which are connected to each other. The air outlet duct 160 and the fan cavity 150 are provided with through holes 191 . The sound absorbing member 200 is provided on the outside of the air outlet duct 160 and the fan cavity 150 corresponding to the through holes 191 . It should be noted that the airflow will change direction and provide power in the fan cavity 150. One end of the air outlet duct 160 is connected to the fan cavity 150, and the other end is connected to the air outlet 172 on the shell 100. After the airflow is accelerated in the fan cavity 150, it is guided by the air outlet duct 160 to the outside of the shell 100. It can be understood that the flow rate of the airflow in the fan cavity 150 and the air outlet duct 160 will be relatively large. In this way, a sound absorbing member 200 is arranged on the outer side of the air outlet duct 160 and the fan cavity 150. The sound absorbing cavity 180 formed by the sound absorbing member 200 reduces the noise of the airflow in the fan cavity 150 and the air outlet duct 160, thereby effectively reducing the noise generated by the airflow of the ventilation device. Of course, in other embodiments, the sound absorbing member 200 may be provided only at the air outlet duct 160 to form a sound absorbing cavity 180 to reduce the noise of the airflow in the air outlet duct 160 , or the sound absorbing member 200 may be provided only at the fan cavity 150 .

[0053] For the noise reduction at the fan chamber 150, in this embodiment, please refer to Figure 2 , Figures 5 to 8 , a wind wheel 300 is provided in the fan cavity 150, and the sound absorbing member 200 of the fan cavity 150 is arranged opposite to the wind wheel 300 along the axial direction of the wind wheel 300. It can be understood that the sound absorbing member 200 of the fan cavity 150 is arranged away from the air inlet end of the wind wheel 300, and the wind wheel 300 is configured as a centrifugal wind wheel 300, which takes in air axially and discharges air radially. The side of the through hole 191 provided on the fan cavity 150 is also opposite to the wind wheel 300 in the axial direction. In this way, the sound absorbing cavity 180 corresponding to the fan cavity 150 can reduce the noise of the airflow on the entire air duct of the fan cavity 150, thereby reducing the noise generated by the ventilation device at the fan cavity 150. At the same time, in the process of continuous centrifugal acceleration of the airflow in the fan cavity 150, the roughness of the connecting seam 192 on the side wall of the fan cavity 150 can also avoid the probability and degree of generating turbulent vortices, thereby reducing the probability and degree of generating secondary noise. It should be noted that, Figure 5 As shown, after the first half shell 110, the sound absorbing member 200 and the first air-outlet sound absorbing member 201 explode, the sound absorbing member 200 and the first air-outlet sound absorbing member 201 flip over to a posture where the cover plate 110 is opposite to the first half shell 110 and the blocking column 220 is away from the first half shell 110, so as to show the structure of the sound absorbing member 200 and the first air-outlet sound absorbing member 201.

[0054] Furthermore, a sound absorbing member 200 may also be provided outside the air inlet duct 140 in the housing 100. Figure 3 , Figure 4 and Figure 6In this embodiment, the air duct also includes an air inlet duct 140, which is opposite to the fan cavity 150 in the axial direction of the wind wheel 300. The air inlet duct 140 is provided with a through hole 191, and the sound absorbing member 200 is provided on the outer side of the air inlet duct 140 corresponding to the through hole 191 and opposite to the air inlet end of the wind wheel 300. As described above, the wind wheel 300 is configured as a centrifugal wind wheel 300, and the wind enters from the axial direction and exits from the radial direction. The air inlet duct 140 and the fan cavity 150 are arranged opposite to each other in the axial direction of the wind wheel 300, so as to meet the air inlet demand of the wind wheel 300 and ensure the operation efficiency of the ventilation device. In addition, the sound absorption cavity 180 formed outside the air inlet duct 140 and the air inlet end of the wind wheel 300 are arranged opposite to each other in the axial direction of the wind wheel 300, so that the sound absorption cavity 180 corresponding to the air inlet duct 140 can reduce the noise of the airflow on the entire air duct of the fan cavity 150, and can also reduce the noise of the airflow in the air inlet duct 140, so as to improve the mute effect of the ventilation device at the air inlet duct 140 and the fan cavity 150. Of course, in other embodiments, the sound absorption cavity 180 corresponding to the air inlet duct 140 can also be distributed on the outside of the air inlet duct 140 in the radial direction of the wind wheel 300.

[0055] Further, in this embodiment, please refer to Figure 3 , Figure 4 and Figure 6 The air inlet 171 is provided in the air inlet 140, and in the direction from the air inlet 171 to the wind wheel 300, the distance between the side wall of the air inlet 140 provided with the through hole 191 and the wind wheel 300 gradually decreases. It should be noted that the air inlet 171 is not opposite to the wind wheel 300 in the axial direction of the wind wheel 300, but takes in air in the radial direction of the wind wheel 300, and the airflow flows toward the air inlet end of the wind wheel 300 under the guidance of the side wall of the air inlet 140 provided with the through hole 191, so as to ensure the air intake of the wind wheel 300. In this way, the airflow in the air inlet duct 140 is likely to collide with the side wall and generate noise. Compared with directly setting the through hole 191 on the side wall opposite to the wind wheel 300, the connecting seam 192 set in this embodiment can reduce the roughness of the side wall of the air inlet duct 140 that guides the airflow into the wind wheel 300, thereby avoiding the probability and degree of turbulent vortices generated in the air inlet duct 140, and further reducing the probability and degree of secondary noise generation.

[0056] When assembling the ventilation device, since the air outlet duct 160 and the fan chamber 150 are arranged in parallel in the radial direction of the wind wheel 300, and the air inlet duct 140 and the fan chamber 150 are arranged in parallel in the axial direction of the wind wheel 300, this embodiment ensures the convenience of forming the ventilation device and improves the production efficiency by assembling multiple half shells. Please refer to Figure 2 , Figure 3 and Figure 6The air outlet duct 160 includes a first air outlet sound absorbing component 201 and a second air outlet sound absorbing component 202 which are opposite to each other in the axial direction of the wind wheel 300. The shell 100 includes a first half shell 110, a second half shell 120 and an air inlet cavity shell 130. The first air outlet sound absorbing component 201 and the sound absorbing component 200 of the wind wheel 300 are arranged on the first half shell 110. The second air outlet sound absorbing component 202 is integrally formed with the air inlet cavity shell 130 and is connected to the second half shell 120. It can be understood that the air inlet cavity shell 130, the second half shell 120 and the first half shell 110 are spliced ​​side by side in the axial direction of the wind wheel 300, and the air inlet cavity shell 130 and the second half shell 120 are connected to enclose the air inlet and outlet duct 140. At the same time, the second air outlet sound-absorbing component 202 on the air inlet cavity shell 130 and the part of the second half shell 120 corresponding to the air outlet duct 160 synchronously enclose the sound-absorbing cavity 180, and the sound-absorbing cavity 180 is used to reduce the noise generated by the airflow in the air outlet duct 160. The second half shell 120 and the first half shell 110 enclose the fan cavity 150 and the air outlet duct 160. In this way, through two connection operations, the sound absorbing cavity 180 formed by the shell 100 and the second air outlet sound absorbing member 202 is formed, and then the first air outlet sound absorbing member 201, the sound absorbing member 200 corresponding to the fan cavity 150, and the sound absorbing member 200 corresponding to the air inlet duct 140 are installed on the outside of the shell 100, and the assembly of the ventilation device is completed, with fewer steps, convenient operation, and improved production efficiency. In another embodiment, the first air outlet sound absorbing member 201 can also be integrally formed with the sound absorbing member 200 corresponding to the fan cavity 150, so that the corresponding air outlet duct 160 and the sound absorbing cavity 180 corresponding to the fan cavity 150 can be enclosed and formed through a single installation operation, further improving the assembly convenience of the ventilation device. Without loss of generality, in this embodiment, the first half shell 110, the second half shell 120 and the air inlet cavity shell 130 are connected by buckling and screwing, which ensures that they can be disassembled and maintained while also improving the convenience of assembly operation.

[0057] Further, in this embodiment, please refer to Figure 1 and Figure 6The sound absorbing chamber 180 formed by the second air outlet sound absorbing member 202 is larger than the sound absorbing chamber 180 formed by the first air outlet sound absorbing member 201. The second air outlet sound absorbing member 202 is arranged on the same side and in parallel with the sound absorbing member 200 of the air inlet duct 140. The two sides of the air outlet duct 160 in the axial direction of the wind wheel 300 are the main side walls of the air outlet duct 160, and the side walls are not opposite to the flow direction of the air flow, but reduce the noise of the air flow in parallel with the flow direction of the air flow, thereby reducing the probability of turbulent vortices formed by the connecting seam 192. It should be noted that, with respect to the air outlet duct 160, the axial width of the sound absorbing chamber 180 formed by the second half shell 120 is larger than the axial width of the sound absorbing chamber 180 formed by the first half shell 110. In this way, the volume of the sound absorbing chamber 180 can be increased, and the noise reduction effect on the air flow in the air outlet duct 160 can be improved. In addition, the second air outlet sound absorbing member 202 and the sound absorbing member 200 outside the air inlet duct 140 are close in axial position on the wind wheel 300, so that the external integrity of the ventilation device is better, the center of gravity of the ventilation device is balanced, and the installation stability of the ventilation device is ensured. Among them, the parallel arrangement does not specifically mean that the second air outlet sound absorbing member 202 and the sound absorbing member 200 outside the air inlet duct 140 are flush, and there may also be a slightly smaller misalignment. It can be understood that, for the sound absorbing member 200 outside the air inlet duct 140, its cover plate 210 is arranged flush with the cover plate 210 of the second air outlet sound absorbing member 202. Since the side wall of the through hole 191 provided in the air inlet duct 140 is inclined, the sound absorbing cavity 180 corresponding to the air inlet duct 140 is in a three-dimensional shape with a triangular cross-section. Similarly, the side wall of the through hole 191 is inclined in the direction from the air inlet 171 to the wind wheel 300, and the length of the corresponding blocking column 220 also gradually increases in this direction to ensure that the end face of the blocking column 220 is arranged flush with the through hole 191 in the air inlet duct 140.

[0058] In one embodiment, for the noise reduction of the air outlet duct 160, please refer to Figures 6 to 8 The air outlet duct 160 extends at the periphery of the fan cavity 150 , and the air outlet direction of the air outlet duct 160 is at a right angle or an acute angle to the air outlet direction of the fan cavity 150 . As can be seen from the above, the first air outlet sound-absorbing member 201 and the second air outlet sound-absorbing member 202 are distributed in the axial direction of the wind wheel 300, that is, the air outlet duct 160 has at least two sound-absorbing chambers 180 for noise reduction, which is adapted to the requirements of high air flow rate and strong noise on the air outlet duct 160. In this embodiment, since the fan cavity 150 discharges air in its radial direction, the air outlet duct 160 extends a certain length in the circumferential direction of the fan cavity 150, until the air outlet direction of the air outlet duct 160 is at a right angle or an acute angle to the air outlet direction of the fan cavity 150, thereby increasing the length of the air outlet duct 160. After the sound-absorbing chamber 180 reduces the noise generated by the turning of the airflow at the volute tongue, the airflow is transported to the external environment to avoid the noise of the airflow in the ventilation device from being directly transmitted from the air outlet 172, thereby improving the user experience.

[0059] The utility model also proposes a fresh air module, which includes a ventilation device. The specific structure of the ventilation device refers to the above embodiment. Since the fresh air module adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the wind wheel in the fresh air module is a centrifugal wind wheel such as an axial flow wind wheel or a crossflow wind wheel.

[0060] The utility model also proposes an air conditioner, which includes the aforementioned fresh air module. The specific structure of the fresh air module refers to the above-mentioned embodiment. Since the air conditioner adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0061] It should be noted that the types of air conditioners of the present invention include but are not limited to duct air conditioners, wall-mounted air conditioners, integrated mobile air conditioners, fresh air fans, air purifiers, etc.

[0062] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A ventilation device, characterized in that: include: A housing having an air duct, wherein a side wall of the air duct is provided with a plurality of through holes; and The sound absorbing component comprises a cover plate and a plurality of blocking columns arranged on the cover plate, wherein the cover plate is arranged on the outer side of the shell and encloses a sound absorbing cavity together with the shell, the ends of the blocking columns extend into the through holes, and a connecting gap is formed between the outer periphery of the blocking columns and the hole wall of the through holes, and the sound absorbing cavity is connected to the air duct through the connecting gap.

2. The ventilation device according to claim 1, characterized in that The air duct comprises a fan cavity and an air outlet duct which are connected to each other. The air outlet duct and the fan cavity are provided with the through holes. The sound absorbing member is arranged on the outside of the air outlet duct and the fan cavity corresponding to the through holes.

3. The ventilation device according to claim 2, characterized in that A wind wheel is arranged in the fan cavity, and a sound absorbing member of the fan cavity is arranged opposite to the wind wheel along the axial direction of the wind wheel.

4. The ventilation device according to claim 3, characterized in that The air duct also includes an air inlet duct, which is opposite to the fan cavity in the axial direction of the wind wheel. The air inlet duct is provided with the through hole, and the sound absorbing component is arranged on the outside of the air inlet duct corresponding to the through hole and opposite to the air inlet end of the wind wheel.

5. The ventilation device according to claim 4, characterized in that The air inlet duct is provided with an air inlet, and in the direction from the air inlet to the wind wheel, the distance between the side wall of the through hole provided in the air inlet duct and the wind wheel gradually decreases.

6. The ventilation device according to claim 4, characterized in that The air outlet duct includes a first air outlet sound absorbing component and a second air outlet sound absorbing component which are opposite to each other in the axial direction of the wind wheel, the shell includes a first half shell, a second half shell and an air inlet cavity shell, the first air outlet sound absorbing component and the sound absorbing component of the wind wheel are arranged on the first half shell, and the second air outlet sound absorbing component is integrally formed with the air inlet cavity shell and connected to the second half shell.

7. The ventilation device according to claim 6, characterized in that The sound absorbing cavity enclosed by the second air outlet sound absorbing member is larger than the sound absorbing cavity enclosed by the first air outlet sound absorbing member, and the second air outlet sound absorbing member is arranged on the same side and in parallel with the sound absorbing member of the air inlet duct.

8. The ventilation device according to claim 2, characterized in that The air outlet duct extends at the outer periphery of the fan cavity, and an air outlet direction of the air outlet duct forms a right angle or an acute angle with an air outlet direction of the fan cavity.

9. A ventilation device according to any one of claims 1 to 8, characterized in that The maximum width of the connecting seam is defined as d, and d satisfies: 0.3 mm ≤ d ≤ 1.2 mm; And / or, on the side wall of the air duct, the end surface of the blocking column is arranged flush with the through hole.

10. The ventilation device according to any one of claims 1 to 8, characterized in that The cross-sectional shape of the blocking column is consistent with the cross-sectional shape of the corresponding through hole; And / or, the cross-sectional shape of the blocking column and / or the cross-sectional shape of the through hole is configured to be at least one of a circle, a triangle and a rectangle.

11. A fresh air module, characterized in that: Comprising the ventilation device as claimed in any one of claims 1 to 10.

12. An air conditioner, characterized in that: Comprising the fresh air module as claimed in claim 11.

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